Schaeffler Technologies Ag & Co .kg

Ina Walzlager Schaeffler Ohg

Ina Schaeffler Kg

Joachim Seitz

Michael Haas

Bodo Rörig

Bodo R&ouml;rig

Dieter Schmidt

Robert Heinemann

Bodo Roerig

Matthew Evans

Joachim Krause

Tracy Novinski

Jens Lang

Anteo Opipari

Dicter Schmidt

A coupling device () of a switchable cam follower (), in which a borehole () extends above a contact () for a support element in an outer lever () of the cam follower (), and this borehole has a first section () of large diameter that starts from an outer side () of a crosspiece () on the other end () to which connects to a second section () of accordingly smaller diameter up to directly before an inner side () of the crosspiece (). A smooth cylindrical coupling slide () is guided in a sealing manner through the second section (), and this coupling slide projects with a sub-region () into the first section (). This sub-region () is encompassed by a compression spring () that acts, on one end, against an annular end () formed between the sections () and, on the other end, against a catch element () arranged on the lateral surface () of the sub-region (). The first section () is closed by a thin-walled plug (), such that a pressure space () for hydraulic medium is located axially between the annular end () of the borehole () and an inner side () of the plug (), and for a coupled case, the coupling slide () can be brought into contact by hydraulic medium that can be guided into the pressure space () before its outer end () with a sub-region () extending on its inner end () with a catch surface () of a cross region () of the inner lever () and, for a decoupled case, the coupling slide () can be displaced in the direction toward the plug () such that it is out of contact from the catch surface () for a switched-off/reduced hydraulic medium pressure via the compression spring ().

Coupling device of a switchable cam follower of a valve train of an internal combustion engine

A switchable support element () for a valve train of an internal combustion engine, said support element () comprising a housing () that can be arranged through an outer peripheral wall () in a reception of the internal combustion engine and in whose bore () an axially movable inner element () extends, a head () of the inner element () protruding beyond an edge () of the housing (), coupling elements () being associated to the inner element () for a selective coupling of the inner element () in an axially extended position of the inner element () to the housing (), and said inner element () being biased by at least one lost motion spring () in a direction leading out of the housing (), wherein the coupling elements () are at least one slide which, in case of uncoupling, is positioned in a guide () of the housing () extending in radial or secant direction and which comprises a flattened upper side () starting from a radially inner front end () of the slide, and this flattened upper side () can be brought into engagement with a flattened lower side () of a recess () in the outer peripheral wall () of the inner element () for effecting coupling.

Switchable support element for a valve train of an internal combustion engine

A switchable finger lever () of a valve train of an internal combustion engine, said finger lever () comprising an outer lever () between whose arms () an inner lever () extends, a support () for at least one gas exchange valve being arranged on one end (), said inner and outer levers () extending on a common axle () in the region of said one end (), said finger lever () further comprising a lost motion spring means () acting between said inner and outer levers (), said outer lever () possessing on the undersurface () on another end (), a contact surface () for a support element, a coupling element () is arranged above or laterally of said contact surface (), which coupling element (), for realizing coupling, can be brought partially into engagement with an entraining surface () of an adjoining crossbar () of the inner lever (), wherein the inner lever (), starting from its crossbar () on the another end (), merges into a box-like open center portion () having two bar-shaped arms ().

Switchable finger lever of a valve train of an internal combustion engine

The invention proposes a switchable component () for a valve train of an internal combustion engine, said component () comprising a housing () in whose bore () an axially displaceable inner element () comprising coupling elements () is received, said coupling elements (), for effecting coupling, being able to be brought partially into engagement with an entraining surface () of the housing (), the inner element () being biased in outward direction from the housing () by a lost motion spring (), and an (outer) anti-rotation device () extending from an outer casing () of the housing () projects beyond a surrounding structure (), the outer anti-rotation device () is configured as a C-shaped, thin-walled ring () comprising a slit (), said ring () extends after the manner of a clip in an annular groove () in the outer casing () of the housing () parallel to a transversal plane of the component () and, for effecting outer anti-rotation, said ring () projects with a sickle-like portion () of its outer peripheral surface () beyond the outer casing () of the housing ().

Switchable component for a valve train of an internal combustion engine

The invention proposes a switchable support element () for a valve train of an internal combustion engine, said support element comprising a housing () in whose bore () an axially displaceable inner element () is received, a coupling means () extending in the inner element () can be brought partially into engagement with an entraining surface () of the housing () for achieving coupling, and said support element () further comprising at least one vertical stop means () that overlaps an annular groove () between the inner element () and the housing () for defining a coupling position of said coupling means () with coupling lash relative to said entraining surface (), the vertical stop means () is constituted by at least one thin-walled ring comprising a slot (), the ring is placed or slipped, slot () ahead, onto an outer peripheral surface () of the housing () to extend parallel to a transverse plane of the support element (), the housing () comprises at least one aperture () through which an inner peripheral segment () of the ring extends, a longitudinal groove () extends in the outer peripheral surface () of the inner element (), and an underside () of the inner peripheral segment () comes to abut against a lower end () of said groove for defining the coupling position.

A switchable support element () comprising a housing () in whose bore () an axially displaceable pressure piston () extends, said support element () comprising at least one coupling element () for an optional coupling of the pressure piston () in its axially extended position relative to the housing (), said pressure piston () being biased in an outward direction from the housing () by at least one lost motion spring (). The housing () ends in a solid bottom () which comprises a central aperture () that starts from its inner side () and is intersected radially by a reception () of the housing () comprising the at least one coupling element (), the pressure piston () extending with an outer peripheral surface () of its head-side guide section () directly in the bore () of the housing (), said guide section () connects in bore direction to a radially reduced center piece () that merges into a head-distal end piece () that is guided in the aperture () of the bottom (), the lost motion spring () surrounds the center piece () and is supported at one end on the inner side () of the bottom () while acting at a further end against an underside () of the guide section (), and the end piece () comprises an entraining surface () for at least one coupling element () for achieving coupling.

A switchable finger lever () of a valve train of an internal combustion engine is provided, including an outer lever () and an inner lever () that extends between the arms thereof. One end of the outer lever () is provided with a contact area () for a head of a resting element on the bottom side () thereof. A smooth-faced longitudinal recess () for a coupling means () extends above the contact area (). Some sections of the coupling means () can be engaged with the driving area () located on a face () of the inner lever () when the levers () are coupled. The coupling means () is provided as a circular cylinder which is freely rotatable in the longitudinal recess () that is provided as a bore. The driving area () is provided on the inner lever () so as to be complementary to the outer envelope () of the coupling means (). Durability in the coupling zone is improved as a result of the fact that the coupling means () is freely rotatable.

Switchable cam follower

A switchable finger lever () for a valve drive of an internal combustion engine is provided. The inner lever () of the finger lever includes a piston () on one end thereof, that can be longitudinally displaced, and acts as a coupling element. The coupling element can be partially brought into contact with a driving surface () of an outer lever (), and is provided, for example, with a rising radial profile () in the coupling region thereof, and from the front () in the coupling direction. The driving surface () of the outer lever () also has a conical contour which follows the profile (). During coupling, a contact point (K) of the piston () is located on the driving surface () in a region of half a depth thereof. In this way, the formation of undesired edge supports is prevented during coupling.

Switchable rocker arm of a valve drive pertaining to an internal combustion engine

An adjustable valve rocker lever () of a valve timing gear of an internal combustion engine comprising an inner lever () and an outer lever () enclosing the former with its arms (), the levers () being connectable to one another by longitudinally displaceable coupling links () in such a way that a large valve lift is generated when coupled and a small valve lift is generated when decoupled, the levers () run on a common axis (), which viewed in the longitudinal direction is arranged between a complementary face () for a support element on the inner lever () and lifting faces () for the lifting cams on upper sides of the levers (), wherein by virtue of its axis (), situated close to the pivot point, such a valve rocker lever () has only a small mass moment of inertia about this pivot point.

Adjustable valve rocker lever of a valve timing gear of an internal combustion engine

A finger lever () that can be switched for different cam lifts is provided. The finger lever includes an outer arm (), between whose limbs () an inner arm () is pivotally mounted. Inside the inner arm (), starting form one end (), a blind borehole () is provided with a coupling element (), which can be longitudinally displaced therein and which, in the event of coupling, can be displaced partially under a driver surface () of a crossbar () of the outer arm (). Height stopping parts () are provided on the inner arm () in the form of a simple, finger-like extension of the inner arm () at the end () thereof which extend out over the crossbar ().

Finger lever of a valve drive of a combustion engine

An adjustable valve rocker lever () of a valve timing gear of an internal combustion engine, having an inner lever () and an outer lever () enclosing the former with its arms (), the levers () running on a common axis () so that they can swivel relative to one another and being connectable to one another by way of coupling links () in such a way that a large valve lift is generated when coupled and a comparatively smaller or zero valve lift is generated when decoupled, the inner lever () on an underside () at one end () of the axis () having a seating face () for an exhaust and refill valve and at the other end (), a complementary face () for a support element, and at least the outer lever () having a lifting face () for a lifting cam, and a lost-motion spring () being provided between the levers (), the axis (), viewed in the longitudinal direction of the valve rocker lever (), being arranged between the seating face () for the exhaust and refill valve and a section directly in front of the lifting face () for the lifting cam on the outer lever (), the lost-motion spring (), viewed in the longitudinal direction, being positioned behind the axis (), outside at the one end ().

Adjustable valve rocker lever

The invention proposes a switchable finger lever ( ) comprising a fork-shaped outer lever ( ) between whose arms ( ) a fork-shaped inner lever ( ) is arranged for pivoting relative thereto. The outer lever ( ) comprises on an underside ( ) in the region of its one closed end ( ), a support ( ) for the gas exchange valve. The inner lever ( ) comprises on the underside ( ) on the opposite end ( ), a complementary surface ( ) for a support element, and on the side of the one end ( ), a cam contacting means ( ). The latter extends on an axle ( ) that is fixed in the outer lever ( ). The two levers ( ) can be coupled and uncoupled at the opposite end ( ) by a transversely displaceable coupling element ( ). In this way, a switchable finger lever ( ) is obtained that can also be designated as a &ldquo;buckling&rdquo; lever and, due to its configuration, has only a small design space requirement. At the same time, the finger lever ( ) has only a low mass moment of inertia and can be installed without complicated modifications in existing cylinder heads.

Finger lever of a valve train of an internal combustion engine

In a valve train of an internal combustion engine having a switchable support element ( ), the lost motion spring ( ) of the support element ( ) is arranged axially offset next to the support element ( ) while being coupled to an inner element ( ) of the support element ( ) by a crossbar ( ). Due to this externally positioned spring ( ), the support element ( ) requires only a relatively small design space.

Valve train of an internal combustion engine comprising one or more switchable support elements

In a switchable support element ( ) for a valve train of an internal combustion engine, the lost motion spring ( ) of the valve train is made as a torsion spring. This spring is arranged outside of the support element ( ) and only the legs and the arms of the spring engage a housing and a head, respectively. In this way, the support element ( ) requires no substantially larger design space than non-switchable prior art elements, particularly in axial direction.

Switchable support element

A switchable support element ( ) requiring only a small design space. For this purpose, a slide ( ) that serves to couple an inner element ( ) to an outer housing ( ) in the support element ( ) is positioned laterally in a housing ( ) arranged in the cylinder head ( ). At the same time, a bore ( ) in the inner element ( ) for the slide ( ) is made as a pocket bore, the housing ( ) being seated through an annular extension ( ) directly in a bore ( ) of the outer housing ( ). The slide ( ) can be displaced electromagnetically or hydraulically in at least

Growing community of inventors

Reundorf, Germany

Joachim Seitz